Improvement in dental an



PATENT FFICE.

EPHRAIM CUTTER, OF WOBURN, MASSACHUSETTS.

IMPROVEMENT IN DENTAL ANESTHETIC INSTRUMENTS.

Specification forming part of LettersUPatent No. 59,562, dated November 13, 1866.

To all whom it may concern:

Be it known that I, Eri-renna GUTTER, of Woburn, in the county of Middlesex and State of Massachusetts, haveinvented an Improved Instrument for Producing Dental Aneesthesia; and I do hereby declare that the following, taken in connection with the drawings which accompany and forni part of this specification, is a description of my invention sufcient to enable those skilled in the art to practice it.

rlhe invention relates to the manner of producin g local anaesthesia by application of cold for dental surgery, and particularly to the peculiar form or construction of the instrument, or spray-producer, by which ether or other uid in the form of spray is thrown against the part to be operated upon, the rapid evaporation of which freezes the part and produces the anaesthesia.

The drawing represents a perspective viewof my instrument.

a b denote the nebulizin g or spray-producing tubes, a being the air-tube, and b the fluid-tube, the former, when bein g fused,havin g air forced through it by a bulb or bellows, or by a mouthpiece, and the latter dipping into the iluidcontaining jar or cup, the fluid being drawn through the tube br by the action of the airblast, and driven inthe form of spray against the surface of the tooth or gum upon which the nebulizing-points may be directed.

The operating ends of the air and luid tubes run side by side, and the extreme end of the tube b is open at its end, or has a line orice leading directly from its end in the line of the tube. The end of each air-tube a is closed, and its orice is made in the inner side thereof, directly adjacent to the fluid-orifice, as seen in the drawing.

Adjacent to or at any suitable distance from the point where the two tubes come together each 1s bifurcated or branched into two arms, c c' d d', each twoA arms on either side being joined and running side by side, and so that at the salient or nebulizing-points each uidtube lies just inside of the air-tube, as seen in the drawing, and with the air-tube projecting slightly beyond the point of the uid-tube.

In freezing the jaw for operations in surgery, it is desirable to apply the cold to each side thereof 5 andv to accomplish this I make the instrument with the fork as shown, inserting the ends in the month, with one prong upon each side, and so as to cause the nebulized iiuid or spray to iinpinge directly against the two surfaces, thereby producing the ansthesia in the speediest and most efficacious manner.

I claim- 1. In combination with the tube c, having its orifice directly in the end thereof, the tube b, having its orifice openin g laterally directly from the tube, substantially as described.

2. The bifurcated construction or arrangement of the i'iebulizing-tubes c b, substantially as described, when the orifices are arranged in the manner set forth.

EPHRAIM CUTTER.

Witnesses:

J. B. GRosBY, F. GoULD. 

